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/*!
* Piwik - free/libre analytics platform
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*/
(function () {
angular.module('piwikApp.filter').filter('evolution', evolutionFilter);
function evolutionFilter() {
function calculateEvolution(currentValue, pastValue)
{
pastValue = parseInt(pastValue, 10);
currentValue = parseInt(currentValue, 10) - pastValue;
var evolution;
if (currentValue === 0 || isNaN(currentValue)) {
evolution = 0;
} else if (pastValue === 0 || isNaN(pastValue)) {
evolution = 100;
} else {
evolution = (currentValue / pastValue) * 100;
}
return evolution;
}
function formatEvolution(evolution)
{
evolution = Math.round(evolution);
if (evolution > 0) {
evolution = '+' + evolution;
}
evolution += '%';
return evolution;
}
return function(currentValue, pastValue) {
var evolution = calculateEvolution(currentValue, pastValue);
return formatEvolution(evolution);
};
}
})();
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